12H, 140H, 143H, 160H and 163H Motor Graders Hydraulic and Steering System Front Axle Caterpillar


Front Axle
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Illustration 1g01391095

Rear view

(1) Wheel lean cylinder

(3) Steering cylinders

(2) Torque for two full nuts ... 700 ± 27 N·m (520 ± 20 lb ft)

(4) Torque for two nuts ... 120 N·m (90 lb ft)

Note: As needed, tighten nuts (4) more in order to align the cotter slot.




Illustration 2g01398511

Section D-D

(E) Exposed length of pin ... 2.0 ± 0.5 mm (0.08 ± 0.02 inch)




Illustration 3g01391033

Section B-B




Illustration 4g01398509

Section C-C

(5) Thickness of washers ... 1.52 ± 0.23 mm (0.060 ± 0.009 inch)

(6) Before you assemble the pin into the bearings in the front axle, apply grease to the pin and the bearings.

Note: As needed, use washers (5) to maintain a maximum gap.

(F) Maximum gap ... 1.5 mm (0.06 inch)

(G) Depth of bearing ... 7.2 ± 0.4 mm (0.28 ± 0.02 inch)




Illustration 5g01398510

Section A-A

(H) Exposed length of pin ... 2.0 ± 0.5 mm (0.08 ± 0.02 inch)




Illustration 6g01391078

Top view

(7) Lean bar

(8) Torque for two nuts on the tie rod clamps ... 75 ± 7 N·m (55 ± 5 lb ft)

(10) Torque for nut on each steering cylinder ... 340 ± 40 N·m (250 ± 30 lb ft)

(11) Torque for two nuts ... 140 ± 14 N·m (105 ± 10 lb ft)

Note: As needed, tighten nuts (11) more in order to align the cotter slot.

(L) The distance that is needed to install the clamps from the rod ends of the tie rod (9) . ... 6.4 mm (0.25 inch)




Illustration 7g01398513

Section J-J




Illustration 8g01398512

Section K-K

(M) Distance from arm assembly to the end of pin ... 45.3 ± 0.3 mm (1.78 ± 0.01 inch)

(N) Minimum gap ... 0.8 mm (0.03 inch)

(P) Depth of bearing ... 8.0 ± 0.5 mm (0.31 ± 0.02 inch)

Information System:

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834B and 836 Landfill Compactor Light Switches
834B and 836 Landfill Compactor Backup Alarm